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<Title>Square Angular Meters</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Square Angular Meters</p>
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<div class="content">
<img src="images/squareameter0.png" width='110' height='110'>&nbsp;&nbsp;<img src="images/squareameter1.png" width='110' height='110'>&nbsp;&nbsp;<img src="images/squareameter2.png" width='110' height='110'>&nbsp;&nbsp;<img src="images/squareameter3.png" width='110' height='110'>
<br><br>
This example demonstrates angular meters of which the pointers are pivoted at the corners of squares.<br><br>
The meters in this example are achieved by using various start angles and end angles with 90 degrees angular span between them.
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<p class="heading1a">Source Code Listing</p>
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<b>[JSP Version]</b> jspdemo/squareameter.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%!
// Function to create the demo charts
void createChart(WebChartViewer viewer, int chartIndex)
{
    // The value to display on the meter
    double value = 4.75;

    // Create an AugularMeter object of size 110 x 110 pixels, using silver background color with a
    // black 2 pixel 3D depressed border.
    AngularMeter m = new AngularMeter(110, 110, Chart.silverColor(), 0x000000, -2);

    // Set meter appearance according to a parameter
    if (chartIndex == 0) {
        // Set the meter center at bottom left corner (15, 95), with radius 85 pixels. Meter spans
        // from 90 - 0 degrees.
        m.setMeter(15, 95, 85, 90, 0);
        // Add a label to the meter centered at (35, 75)
        m.addText(35, 75, "VDC", "Arial Bold", 12, Chart.TextColor, Chart.Center);
        // Add a text box to show the value at top right corner (103, 7)
        m.addText(103, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.TopRight
            ).setBackground(0, 0, -1);
    } else if (chartIndex == 1) {
        // Set the meter center at top left corner (15, 15), with radius 85 pixels. Meter spans from
        // 90 - 180 degrees.
        m.setMeter(15, 15, 85, 90, 180);
        // Add a label to the meter centered at (35, 35)
        m.addText(35, 35, "AMP", "Arial Bold", 12, Chart.TextColor, Chart.Center);
        // Add a text box to show the value at bottom right corner (103, 103)
        m.addText(103, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.BottomRight
            ).setBackground(0, 0, -1);
    } else if (chartIndex == 2) {
        // Set the meter center at top right corner (15, 95), with radius 85 pixels. Meter spans
        // from 270 - 180 degrees.
        m.setMeter(95, 15, 85, 270, 180);
        // Add a label to the meter centered at (75, 35)
        m.addText(75, 35, "KW", "Arial Bold", 12, Chart.TextColor, Chart.Center);
        // Add a text box to show the value at bottom left corner (7, 103)
        m.addText(7, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.BottomLeft
            ).setBackground(0, 0, -1);
    } else {
        // Set the meter center at bottom right corner (95, 95), with radius 85 pixels. Meter spans
        // from 270 - 360 degrees.
        m.setMeter(95, 95, 85, 270, 360);
        // Add a label to the meter centered at (75, 75)
        m.addText(75, 75, "RPM", "Arial Bold", 12, Chart.TextColor, Chart.Center);
        // Add a text box to show the value at top left corner (7, 7)
        m.addText(7, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.TopLeft
            ).setBackground(0, 0, -1);
    }

    // Meter scale is 0 - 10, with a major tick every 2 units, and minor tick every 1 unit
    m.setScale(0, 10, 2, 1);

    // Set 0 - 6 as green (99ff99) zone, 6 - 8 as yellow (ffff00) zone, and 8 - 10 as red (ff3333)
    // zone
    m.addZone(0, 6, 0x99ff99, 0x808080);
    m.addZone(6, 8, 0xffff00, 0x808080);
    m.addZone(8, 10, 0xff3333, 0x808080);

    // Add a semi-transparent black (80000000) pointer at the specified value
    m.addPointer(value, 0x80000000);

    // Output the chart
    viewer.setChart(m, Chart.SVG);
}
%&gt;
&lt;%
// This example includes 4 charts
WebChartViewer[] viewers = new WebChartViewer[4];
for (int i = 0; i &lt; viewers.length; ++i) {
    viewers[i] = new WebChartViewer(request, "chart" + i);
    createChart(viewers[i], i);
}
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Square Angular Meters&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Square Angular Meters
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here are the chart images ****** --&gt;
    &lt;%
        for (int i = 0; i &lt; viewers.length; ++i) {
            out.write(viewers[i].renderHTML(response));
            out.write(" ");
        }
    %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
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<br><hr class="separator"><div class="copyright">&copy; 2022 Advanced Software Engineering Limited. All rights reserved.</div>
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